US 12,294,121 B2
End cover assembly, housing assembly, battery cell, battery, and electric equipment
Xinxiang Chen, Ningde (CN); Shoujun Huang, Ningde (CN); Yulian Zheng, Ningde (CN); Peng Wang, Ningde (CN); Wei Li, Ningde (CN); and Chengdu Liang, Ningde (CN)
Assigned to Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong (CN)
Appl. No. 17/622,024
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
PCT Filed Sep. 7, 2020, PCT No. PCT/CN2020/113784
§ 371(c)(1), (2) Date Dec. 22, 2021,
PCT Pub. No. WO2022/047788, PCT Pub. Date Mar. 10, 2022.
Prior Publication US 2022/0367996 A1, Nov. 17, 2022
Int. Cl. H01M 50/655 (2021.01); H01M 50/103 (2021.01); H01M 50/15 (2021.01); H01M 50/184 (2021.01); H01M 50/186 (2021.01); H01M 50/209 (2021.01); H01M 50/308 (2021.01); H01M 50/342 (2021.01)
CPC H01M 50/655 (2021.01) [H01M 50/103 (2021.01); H01M 50/15 (2021.01); H01M 50/184 (2021.01); H01M 50/186 (2021.01); H01M 50/209 (2021.01); H01M 50/308 (2021.01); H01M 50/3425 (2021.01); H01M 2200/20 (2013.01); H01M 2220/20 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An end cover assembly for a battery cell, comprising:
an end cover provided with a through hole for electrolyte injection and a first clamping portion, wherein the first clamping portion is disposed along a circumferential direction of the through hole and located on one side of the end cover away from an interior of the battery cell;
a sealing ring for sealing the through hole; and
a pressure relief device covering at least part of the sealing ring and closing the through hole, wherein the pressure relief device is configured to be destroyed when an internal pressure of the battery cell reaches a threshold, so as to remove a closure of the through hole and release the internal pressure of the battery cell;
wherein the pressure relief device comprises a second clamping portion and is rotatable such that when the pressure relief device is rotated to a first position, the second clamping portion is clamped with the first clamping portion to limit separation of the pressure relief device from the end cover, and when the pressure relief device is rotated to a second position, the second clamping portion is disengaged from the first clamping portion to realize separation of the pressure relief device and the end cover,
wherein the first clamping portion is one of a clamping slot and a clamping column, and the second clamping portion is the other of the clamping slot and the clamping column, and
wherein in a height direction, the first clamping portion is not lower than a position of the sealing ring.